| 1 |
1350 year-old Big Obsidian Flow, Newberry Caldera, Newberry National Volcanic Monument, Oregon |
| 2 |
Summit of Big Southern Butte, Snake River Plains, Idaho |
| 3 |
Clovis point from Oregon collection - trace element analysis of the artifact indicated that the source was located at Medicine Lake Volcano in northern California |
| 4 |
Cougar Mountain, a major source of obsidian for the inhabitants of the Fort Rock Basin, Oregon |
| 5 |
Glass Mountain, a spectacular 900 year-old obsidian flow on the flanks of Medicine Lake Volcano, northern California |
| 6 |
Little Glass Butte, Medicine Lake Volcano, northern California |
| 7 |
Little Glass Mountain, a major prehistoric source of obsidian located within the Glass Buttes Source Complex, central Oregon |
| 8 |
View of Newberry Caldera from the summit of Paulina Peak, Newberry National Volcanic Monument, Oregon |
| 9 |
An early lithograph of Obsidian Cliff, Yellowstone National Park, Wyoming (from Iddings 1888) |
| 10 |
1998 photograph of Obsidian Cliff, Yellowstone National Park, Wyoming |
| 11 |
Facing north across Obsidian Creek towards Obsidian Cliff, Yellowstone National Park, Wyoming |
| 12 |
Obsidian Cliffs obsidian flow, Three Sisters Wilderness, High Cascades, Oregon |
| 13 |
Obsidian Cliffs plateau with the Middle Sister in the background, Three Sisters Wilderness, High Cascades, Oregon |
| 14 |
Puu Waawaa, Island of Hawaii - the only source of obsidian in the state |
